This update enables file system journaling on MacBook and MacBook Pro notebook computers. Some MacBook and MacBook Pro systems were shipped with file system journaling turned off. Journaling is recommended on all Mac computers as a preventative measure against file corruption.As Apple explains, this update activates journaling on MacBooks and MacBook Pros which did have this functionality activated from the factory (it seems that they forgot to do this)
After installing this update, please click here, for further instruction.
For a reminder, journaling enables the tracking of all the latest changes performed on a hard drive and also protects against the loss of data in case your Mac crashes. In addition it limits hard drive corruption and inconsistencies in the file system in case of a hard shutdown.
To find out if your partitions are journaled or not, and to activate this functionality, it suffices to open Disk Utility:
